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Determination of Fluazinam in Vegetables and Fruits Using a Modified QuEChERS Method and Liquid Chromatography-Tandem Mass Spectrometry

文献类型： 外文期刊

作者： Li, Yubo 1 ; Tang, Hongxia 1 ; Black, Kezia C. 2 ; Dong, Maofeng 1 ; Wang, Weimin 1 ; Song, Weiguo 1 ;

作者机构： 1.Shanghai Acad Agr Sci, Inst Agrofood Stand & Testing Technol, Pesticide Safety Evaluat Res Ctr, Shanghai 201403, Peoples R China

2.China Agr Univ, Coll Hort, Dept Vegetable Sci, Beijing 100193, Peoples R China

关键词： Fluazinam;MWCNTs-OH;QuEChERS;LC-MS/MS

期刊名称：FOOD ANALYTICAL METHODS （ 影响因子：3.366； 五年影响因子：3.07 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： A modified quick, easy, cheap, effective, rugged, and safe (QuEChERS) sample preparation was developed for the determination of fluazinam in six vegetables (cabbage, cucumber, tomato, pak choi, spinach, and zucchini) and four fruits (apple, grape, orange, and strawberry), followed by liquid chromatography-tandem mass spectrometry (LC-MS/MS). Samples were purified by dispersive solid-phase extraction (d-SPE) using hydroxylated multi-walled carbon nanotubes (MWCNTs-OH) as the absorbent. Method validation yielded satisfactory results in terms of the linearity (R-2 > 0.99) over a range of 1-500 mu g L-1, fortified recovery (81-115%) at three spiked levels, precision (RSDs ae<currency>12%), and sensitivity (limit of quantification (LOQ) of 5 ng g(-1)). The established method was further applied to determine fluazinam in 120 vegetable samples and 80 fruit samples collected from local markets. The fluazinam residues in most of the samples were below the LOQ, except for two strawberry samples containing 97 and 135 ng g(-1). Therefore, the present method was proven to be a reliable and convenient analytical method for monitoring fluazinam residues in vegetable and fruit matrices.

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